| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a [num] per | 533 |
|
| 2 | [prep] a [num] per | 533 |
|
| 3 | for [art] [num] per | 125 |
|
| 4 | for a [num] [no cls] | 87 |
|
| 5 | for a [num] [unc] | 87 |
|
| 6 | for a [num] per | 81 |
|
| 7 | for a [adj] per | 81 |
|
| 8 | for a [num] per | 81 |
|
